Speaker assembly having plural drivers
AssigneesFujitsu Ten Limited, Timedomain Corporation
InventorsKatsuhiko Tsumori, Akira Nishikawa, Hiroshi Kowaki, Hiroyuki Yoshii
Life of this patent
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Abstract
A weight is attached to the rear side of a magnetic circuit of a speaker unit. The tip of a boss that projects to the front side from the weight is joined to the rear side of a center pole of the magnetic circuit with a bolt. Even if reactive force that is generated when an electrical signal is converted into mechanical vibration by the magnetic circuit and a voice coil and sound waves are emitted from a vibration plate is transmitted to the magnetic circuit, the vibration of the magnetic circuit is suppressed by the weight. In this manner, sound quality with a good transient characteristic can be obtained.
Claims1
A speaker apparatus comprising:
- a speaker unit including a main converter for converting an electrical signal into mechanical vibration, a vibration plate for emitting sound waves to the front side of the main converter, and a frame fixed to the converter, for vibratably supporting the vibration plate from a rear side thereof;
- a compensation converter fixed to a rear side of the main converter, for converting an electrical signal to mechanical vibration, the compensation converter being smaller and lighter than the main converter;
- and
- a compensation mass body lighter than the vibration plate, for serving as a load of mechanical vibration of the compensation converter.
Dependencies are inferred from the claim text.